package com.qs.rocketmq.common.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * SpringContextHolder
 */
@Component
public class SpringContextHolder implements ApplicationContextAware {

    private static ApplicationContext appContext = null;

    /**
     * 通过name获取 Bean.
     */
    public static Object getBean(String beanName) {
        return appContext.getBean(beanName);

    }

    /**
     * 通过class获取Bean.
     */
    public static <T> T getBean(Class<T> clazz) {
        return appContext.getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     */
    public static <T> T getBean(String beanName, Class<T> clazz) {
        return appContext.getBean(beanName, clazz);
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        appContext = applicationContext;
    }
}
